1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
#include <sys/types.h>
#if defined(__i386__) || defined(__x86_64__) || defined(__ia64__)
#include <sys/io.h>
#endif
#include <sys/mman.h>
#include <netinet/in.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <assert.h>
#include <limits.h>
#include <ctype.h>
#include <fcntl.h>
#include <unistd.h>
#include "get-edid.h"
#include "int10/vbios.h"
#ifdef __i386__
#define cpuemu 0
#else
#define cpuemu 1
#endif
#include <stdarg.h>
/* also used by libint10 */
void log_err(char *format, ...)
{
if (verbose) {
va_list args;
va_start(args, format);
vfprintf(stderr, format, args);
va_end(args);
}
}
/*
* Create a 'canonical' version, i.e. no spaces at start and end.
*
* Note: removes chars >= 0x80 as well (due to (char *))! This
* is currently considered a feature.
*/
static char *canon_str(char *s, int len)
{
char *start, *end;
for (start = s; start < s + len; start++) if (start[0] > ' ') break;
for (end = &s[len - 1]; end >= start; end--) {
if (end[0] > ' ') break;
end[0] = 0;
}
return start;
}
static unsigned segofs2addr(unsigned char *segofs)
{
return segofs[0] + (segofs[1] << 8) + (segofs[2] << 4)+ (segofs[3] << 12);
}
static unsigned get_data(unsigned char *buf, unsigned buf_size, unsigned addr)
{
unsigned bufferaddr = 0x7e00;
unsigned len;
*buf = 0;
len = 0;
if(addr >= bufferaddr && addr < bufferaddr + 0x200) {
len = bufferaddr + 0x200 - addr;
if(len >= buf_size) len = buf_size - 1;
memcpy(buf, addr + (char *) 0, len);
}
else if(addr >= 0x0c0000 && addr < 0x100000) {
len = 0x100000 - addr;
if(len >= buf_size) len = buf_size - 1;
memcpy(buf, addr + (char *) 0, len);
}
buf[len] = 0;
return len;
}
static char *get_str(unsigned char *buf, unsigned buf_size, char *v)
{
int len = get_data(buf, buf_size, segofs2addr(v));
return canon_str(buf, len);
}
#define GET_WORD(ADDR, OFS) ((ADDR)[OFS] + ((ADDR)[(OFS) + 1] << 8))
int vbe_check_vbe_info(void)
{
int i;
unsigned char v[0x200];
int ax, bx, cx;
/* Setup registers for the interrupt call */
ax = 0x4f00;
bx = 0;
cx = 0;
memset(v, 0, sizeof(v));
strcpy(v, "VBE2");
/* Get VBE block */
i = CallInt10(&ax, &bx, &cx, v, sizeof(v), cpuemu) & 0xffff;
if (i != 0x4f) {
log_err("VBE: Error (0x4f00): 0x%04x\n", i);
return 0;
}
{
unsigned char tmp[1024];
/* Parse VBE block */
int version = GET_WORD(v, 0x04);
int oem_version = GET_WORD(v, 0x14);
int memory_size = GET_WORD(v, 0x12) << 16;
log_err("VBE version: %u.%u, oem version = %u.%u\n",
version >> 8, version & 0xff, oem_version >> 8, oem_version & 0xff);
log_err("Memory: %uk\n", memory_size >> 10);
log_err("OEM name: %s\n", get_str(tmp, sizeof tmp, v + 0x06));
log_err("Vendor name: %s\n", get_str(tmp, sizeof tmp, v + 0x16));
log_err("Product name: %s\n", get_str(tmp, sizeof tmp, v + 0x1a));
log_err("Product revision: %s\n", get_str(tmp, sizeof tmp, v + 0x1e));
}
return 1;
}
/* Get EDID info. */
int vbe_get_edid_info(char *edid)
{
int i;
int ax, bx, cx;
/* Setup registers for the interrupt call */
ax = 0x4f15;
bx = 1;
cx = 0;
/* Get EDID block */
i = CallInt10(&ax, &bx, &cx, edid, 256, cpuemu) & 0xffff;
if (i != 0x4f) {
log_err("EDID: Error (0x4f15): 0x%04x\n", i);
return 0;
}
return 1;
}
int get_edid(char *edid)
{
int pci_config_type = 1; /* Determine PCI configuration type */
int ok;
/* Initialize Int10 */
ok = box_is_xbox() || InitInt10(pci_config_type) == 0;
if (ok) {
ok =
(box_is_xbox() || vbe_check_vbe_info()) &&
vbe_get_edid_info(edid);
FreeInt10();
} else if (getuid() != 0)
fprintf(stderr, "you must be root to run this program\n");
return ok ? 128 : 0;
}
int box_is_xbox() {
int is_xbox = 0;
int result = -1;
int fd;
size_t rd;
char *xbox_id = "0000\t10de02a5";
char id[13];
if (!(fd = open("/proc/bus/pci/devices", O_RDONLY))) {
printf("Unable to open /proc/bus/pci/devices\n");
}
if (!(rd = read(fd, id, sizeof(id)))) {
printf("Unable to read /proc/bus/pci/devices\n");
}
if (fd > 0)
close(fd);
result = strncmp(id, xbox_id, 13);
if (result == 0)
is_xbox = 1;
return is_xbox;
}
|
